Editing Nissan VH engine (section)

==VH45DE==
The '''VH45DE''' is a {{Convert|4494|cc|L|1|order=flip}} V8 developed by [[Nissan]] for use in the [[Infiniti Q45]] sport luxury sedan (G50 platform) which was released in November 1989. The engine was also used in the [[Japanese domestic market|Japanese market]] [[Nissan President]] limousine (JG50 platform) which debuted in late 1990. The VH45DE typically generates {{cvt|280|PS|kW hp|0}} at 6000&nbsp;rpm and {{cvt|40.8|kgm|Nm lbft|0}} at 4,000&nbsp;rpm with a redline of 6900&nbsp;rpm.

Some of the pertinent features of the '''VH45DE''' are [[forged steel]] [[crankshaft]], forged steel [[connecting rod]]s, 6 Bolt [[main bearing]] caps with studs, full-length main bearing girdle, lightweight, floating pistons with [[molybdenum]] coating, sodium-filled exhaust valves, cross-flow cooling system, hydraulic lash adjusters, single-row silent timing chain, coil-on-plug ignition system, lifter buckets ride directly on cams to reduce friction, redline of 6900&nbsp;rpm, compression ratio of 10.2:1, bore and stroke of {{Convert|93x82.7|mm|2|abbr=on}}, dimensions: {{convert|890|mm|2|abbr=on}}(L) x {{convert|740|mm|2|abbr=on}}(W) x {{convert|725|mm|2|abbr=on}}(H).

The {{Convert|4494|cc|L|1|order=flip|abbr=on}} '''VH45DE''' featured [[variable valve timing]], also known as '''VTC''', from 1990 until 1995. This was during the time that the "Gentleman's Agreement" between Japan's automotive manufacturers was in effect, requiring all cars sold in their home market to (on paper, at least) produce no more than 280&nbsp;PS. Due to tightening emissions regulations in the [[United States domestic market|US market]], the VTC feature was dropped from the 1996 [[Infiniti Q45]].{{Citation needed|reason=Unsubstantiated rumor.|date=February 2018}} In the following year, the VH45DE was no longer available in any US market vehicles. The engine continued on in the Japanese market until 2002 in the [[Nissan President]] limousine; power was somewhat lower in the President to make it quieter and smoother.

VH45DEs made before 1994 used plastic timing chain guides, and over time these have been known to fail. This results in a noisy valve-train and parts of the plastic guides can end up in the sump and oil pickup, resulting in engine damage. Nissan changed to metal backed chain guides from 1994 onwards. 

This engine was used in the following vehicle(s):
* 1990-1996 [[Infiniti Q45]], {{cvt|280|PS|kW hp|0}} at 6,000&nbsp;rpm, {{cvt|40.8|kgm|Nm lbft|0|order=out}} at 4,000&nbsp;rpm
* 1990-2002 [[Nissan_President#President_HG50|Nissan President]], {{cvt|270|PS|kW hp|0}} at 5,600&nbsp;rpm, {{cvt|40.2|kgm|Nm lbft|0|order=out}} at 4,000&nbsp;rpm

The VH45DE became a relatively popular engine swap for other platforms due to being low cost to source and also able to be adapted to a Nissan [[manual transmission]] when using an aftermarket adapter plate. The VH45DE is also used in a variety of motorsports ranging from drifting to [[drag racing]], boat racing, and dirt track sprint cars (Australia and New Zealand).